Question

Based on your understanding of the properties of matter choose the incorrect sentence.
Select one:
a. When a few crystals of potassium permagnate are placed at the bottom of a beaker containing water, then water in the whole beaker turns green slowly.
b. The best evidence that particles of matter are constantly moving comes from the studies of diffusion .
c. Each copper sulphate crystal itself must be made up of millions of small particles which keep on spreading and imparting color to more and more of water.
d. When a beam of Sunlight enters a room, we can see tiny dust particles suspended in air which are moving rapidly in a very haphazard way.

Answer 1

Answer:

I don't know your question answer

Answer 2

Explanation:

for a) yes it's correct because KMO4 is placed water it fast turns into blue then after a few minutes green

b)yes it's correct because when you check it on web and go to website of ncert solution class 9 its written that diffusion and brownian motion prove that particle of matter are moving constantly

d) yes it's true because not only in case of sunlight but also when you which on a torch in dark you would observe that in front of the light you can see dust particles moving

for c) I think its the incorrect one,( not sure) because it didn't found any clue about it

so as per the given explaination I think that c is correct

please forgive if I am wrong,

hope it helps